Outboard motor and marine vessel
An outboard motor includes a steering including a first steering to rotate a first lower portion of the outboard motor in a right-left direction with respect to a hull, and a second steering to integrally rotate the first lower portion and a second lower portion of the outboard motor in the right-left direction with respect to the hull. The steering does not rotate an upper portion of the outboard motor in the right-left direction with respect to the hull.
1 . An outboard motor comprising:
a bracket;
an outboard motor main body attachable to a hull via the bracket and including a lower portion including a first lower portion on which a propeller is provided and a second lower portion above the first lower portion, and an upper portion above the lower portion and including a drive source for the propeller; and
a steering to rotate the lower portion in a right-left direction with respect to the hull, and that does not rotate the upper portion in the right-left direction with respect to the hull; wherein
the steering includes a first steering to rotate the first lower portion in the right-left direction with respect to the hull, and a second steering to integrally rotate the first lower portion and the second lower portion in the right-left direction with respect to the hull.
2 . The outboard motor according to claim 1 , wherein the first steering and the second steering are operable independently of each other.
3 . The outboard motor according to claim 2 , further comprising:
a first steering shaft and a second steering shaft separate from the first steering shaft; wherein
the first steering is operable to rotate the first lower portion in the right-left direction about the first steering shaft with respect to the hull; and
the second steering is operable to integrally rotate the first lower portion and the second lower portion in the right-left direction about the second steering shaft with respect to the hull.
4 . The outboard motor according to claim 3 , wherein
the first lower portion is rotatable in the right-left direction with respect to the hull within a first angular range by the first steering;
the first lower portion and the second lower portion are integrally rotatable in the right-left direction with respect to the hull within a second angular range by the second steering; and
the first angular range is larger than the second angular range.
5 . The outboard motor according to claim 4 , wherein
the first steering includes an electric motor to rotate the first lower portion in the right-left direction with respect to the hull; and
the second steering includes a hydraulic pump to integrally rotate the first lower portion and the second lower portion in the right-left direction with respect to the hull.
6 . The outboard motor according to claim 4 , wherein the first angular range is 360 degrees.
7 . The outboard motor according to claim 3 , wherein the first steering shaft is rearward of the second steering shaft in the outboard motor main body.
8 . The outboard motor according to claim 3 , further comprising:
a propeller shaft in the first lower portion operable to rotate together with the propeller; and
a drive shaft to transmit a driving force from the drive source for the propeller to the propeller shaft; wherein
the drive shaft includes a first drive shaft coaxial with the first steering shaft, and a second drive shaft coaxial with the second steering shaft.
9 . The outboard motor according to claim 8 , wherein
the first steering shaft is hollow, and the first drive shaft extends through the first steering shaft; and
the second steering shaft is hollow, and the second drive shaft extends through the second steering shaft.
10 . The outboard motor according to claim 3 , wherein
the outboard motor includes a plurality of outboard motors adjacent to each other; and
the first steerings of the plurality of outboard motors are operable to rotate the first lower portions in the right-left direction about the first steering shafts with respect to the hull while the first lower portions and the second lower portions are integrally rotated in the right-left direction about the second steering shafts with respect to the hull by the second steerings while the first steering shafts are spaced apart from each other.
11 . The outboard motor according to claim 1 , wherein the upper portion includes an engine as the drive source for the propeller.
12 . A marine vessel comprising:
a hull; and
a plurality of outboard motors attached to the hull side by side in a right-left direction of the marine vessel; wherein
each of the plurality of outboard motors includes:
an outboard motor main body including a lower portion including a first lower portion on which a propeller is provided and a second lower portion above the first lower portion, and an upper portion above the lower portion and including a drive source for the propeller; and
a steering to rotate the lower portion in the right-left direction with respect to the hull, and to not rotate the upper portion in the right-left direction with respect to the hull; and
the steering includes a first steering to rotate the first lower portion in the right-left direction with respect to the hull, and a second steering to integrally rotate the first lower portion and the second lower portion in the right-left direction with respect to the hull.
13 . The marine vessel according to claim 12 , wherein the first steering and the second steering are operable independently of each other.
14 . The marine vessel according to claim 13 , wherein
each of the plurality of outboard motors further includes a first steering shaft and a second steering shaft separate from the first steering shaft in the outboard motor main body;
the first steering is operable to rotate the first lower portion in the right-left direction about the first steering shaft with respect to the hull; and
the second steering is operable to integrally rotate the first lower portion and the second lower portion in the right-left direction about the second steering shaft with respect to the hull.
15 . The marine vessel according to claim 14 , wherein
the hull includes a controller configured or programmed to control the first steerings and the second steerings of the plurality of outboard motors; and
the controller is configured or programmed to control the first steerings of the plurality of outboard motors to rotate the first lower portions in the right-left direction about the first steering shafts with respect to the hull while controlling the second steerings of the plurality of outboard motors to integrally rotate the first lower portions and the second lower portions in the right-left direction about the second steering shafts with respect to the hull while the first steering shafts are spaced apart from each other.
16 . The marine vessel according to claim 14 , wherein
the first lower portion is rotatable in the right-left direction with respect to the hull within a first angular range by the first steering;
the first lower portion and the second lower portion are integrally rotatable in the right-left direction with respect to the hull within a second angular range by the second steering; and
the first angular range is larger than the second angular range.
17 . The marine vessel according to claim 16 , wherein
the first steering includes an electric motor to rotate the first lower portion in the right-left direction with respect to the hull; and
the second steering includes a hydraulic pump to integrally rotate the first lower portion and the second lower portion in the right-left direction with respect to the hull.
18 . The marine vessel according to claim 16 , wherein the first angular range is 360 degrees.
19 . The marine vessel according to claim 14 , wherein the first steering shaft is rearward of the second steering shaft in the outboard motor main body.
20 . The marine vessel according to claim 14 , wherein
each of the plurality of outboard motors further includes:
a propeller shaft in the first lower portion operable to rotate together with the propeller; and
a drive shaft to transmit a driving force from the drive source for the propeller to the propeller shaft; and
the drive shaft includes a first drive shaft coaxial with the first steering shaft, and a second drive shaft coaxial with the second steering shaft.